Add settings page for managing forecasting API key and URL via UI

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/node_modules/es-toolkit/dist/array/chunk.js

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+//#region src/array/chunk.ts
+/**
+* Splits an array into smaller arrays of a specified length.
+*
+* This function takes an input array and divides it into multiple smaller arrays,
+* each of a specified length. If the input array cannot be evenly divided,
+* the final sub-array will contain the remaining elements.
+*
+* @template T The type of elements in the array.
+* @param arr - The array to be chunked into smaller arrays.
+* @param size - The size of each smaller array. Must be a positive integer.
+* @returns A two-dimensional array where each sub-array has a maximum length of `size`.
+* @throws {Error} Throws an error if `size` is not a positive integer.
+*
+* @example
+* // Splits an array of numbers into sub-arrays of length 2
+* chunk([1, 2, 3, 4, 5], 2);
+* // Returns: [[1, 2], [3, 4], [5]]
+*
+* @example
+* // Splits an array of strings into sub-arrays of length 3
+* chunk(['a', 'b', 'c', 'd', 'e', 'f', 'g'], 3);
+* // Returns: [['a', 'b', 'c'], ['d', 'e', 'f'], ['g']]
+*/
+function chunk(arr, size) {
+	if (!Number.isInteger(size) || size <= 0) throw new Error("Size must be an integer greater than zero.");
+	const chunkLength = Math.ceil(arr.length / size);
+	const result = Array(chunkLength);
+	for (let index = 0; index < chunkLength; index++) {
+		const start = index * size;
+		const end = start + size;
+		result[index] = arr.slice(start, end);
+	}
+	return result;
+}
+//#endregion
+exports.chunk = chunk;